THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
...
| Discussion thread | https://lists.apache.org/thread/h2lgqgrvcptzj3c8q4cjzv5jopgtwx9o |
|---|---|
| Vote thread | https://lists.apache.org/thread/09lfq4j7w23h6o1lmywl6k9691sqykhm |
| ISSUE | https://github.com/apache/incubator-paimon/issues/742 |
| Release | TBD0.6 |
Motivation
Currently Paimon runs without monitoring and metrics out of box. In the production environment, users need to know how their Paimon Table behaves like what is the commit duration, how many files each commit added or deleted, the status of compaction operation, the duration of scan query, lag of streaming reading and so on. So we need to introduce a metrics system and more metrics for Paimon.
...
| draw.io Diagram | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Metrics Registering
Take CommitMetrics as example, the CommitMetrics will be instantiated by FileStoreCommitImpl, then commit related metrics will be registered by the corresponding MetricGroup in the Metrics instance.
...
Metric Name | Description | Type | Tagged | Unit | Update at | ||
lastCommitDuration | The time it took to complete the last commit. | Gauge | none | Ms | Timer starts before commit starting, update commit duration after the last commit finished. | ||
commitDuration | Distributions of the time taken by the last few commits. | Histogram | none | Ms | Timer starts before commit starting, update commit duration after each commit finished. | ||
lastCommitAttempts | The number of attempts the last commit made. | Gauge | none | Number | Increment by 1 when trying to commit once, clear the counter after the last commit finished. | ||
lastTableFilesAdded | Number of added table files in last commit, including newly created data files and compacted after. | Gauge | Partition, Bucketnone | Number | Collecting changes from committables | ||
lastTableFilesDeleted | Number of deleted table files in last commit, which comes from compacted before. | Gauge | Partition, Bucketnone | Number | Collecting changes from committables | ||
lastTableFilesAppended | Number of appended table files in last commit, which means the newly created data files. | Gauge | Partition, Bucketnone | Number | Collecting changes from committables | ||
lastTableFilesCommitCompated | Number of compacted table files in last commit, including compacted before and after. | Gauge | Partition, Bucketnone | Number | Collecting changes from committables | ||
lastChangelogFilesAppended | Number of appended changelog files in last commit | Gauge | Partition, Bucketnone | Number | Collecting changes from committables | ||
lastChangelogFileCommitCompacted | Number of compacted changelog files in last commit | Gauge | Partition, Bucketnone | Number | Collecting changes from committables | ||
totalTablesFileslastGeneratedSnapshots | Number of total data files currently maintained on storage.snapshot files generated in last commit, maybe 1 snapshot or 2 snapshots. | GaugeCounter | none | Number | Collecting After collecting changes from committables | ||
totalChangelogFiles | Number of total changelog files currently maintained on storage. | Counter | none | Number | Collecting changes from committables | ||
lastGeneratedSnapshots | Number of snapshot files generated in last commit, maybe 1 snapshot or 2 snapshots. | Gauge | none | Number | After collecting changes from committables | ||
totalSnapshots | Number of currently retained total snapshots. | Gauge | none | Number | When trying to commit, the counter will increment by the number of snapshots generated When expiring snapshots, the counter will decrement by the number of expiring snapshots. | ||
lastDeltaRecordsAppended | Delta records count | lastDeltaRecordsAppended | Delta records count in last commit with APPEND commit kind | Gauge | Partition, Bucketnone | Number | Preparing snapshot file with APPEND commit kind |
lastChangelogRecordsAppended | Changelog records count in last commit with APPEND commit kind | Gauge | Partition, Bucketnone | Number | Preparing snapshot file with APPEND commit kind | ||
lastDeltaRecordsCommitCompated | Delta records count in last commit with COMPACT commit kind | Gauge | Partition, Bucketnone | Number | Preparing snapshot file with COMPACT commit kind | ||
lastChangelogRecordsCommitCompated | Changelog records count in last commit with COMPACT commit kind | Gauge | Partition, Bucketnone | Number | Preparing snapshot file with COMPACT commit kind | ||
lastPartitionsWritten | Number of partitions written in last commit | Gauge | none | Number | After collecting changes from committables | ||
lastBucketsWritten | Number of buckets written in last commit | Gauge | none | Number | After collecting changes from committables |
...
Metric Name | Description | Type | Tagged | Unit | Update at | ||||||
lastScanDuration | The time it took to complete the last scan planning. | Gauge | Partition, Bucketnone | Ms | Timer starts before the scan planning starts, update after the last scan planning operation finished | ||||||
scanDuration | Distributions of the time taken by the last few scan planning operations. | Histogram | Partition, Bucketnone | Ms | Timer starts before the scan planning starts, update after each planning finished | ||||||
lastScannedManifests | Number of scanned manifests files in the last scan planning. | Gauge | Partition, Bucketnone | Number | Scan planning | ||||||
lastScanSkippedManifests | Number of skipped manifests files in the last scan planning. | Gauge | Partition, Bucket | Number | Scan planning | lastScanResultTableFiles | Number of result table manifests files in the last scan planning. | Gauge | Partition, Bucketnone | Number | Scan planning |
lastScanGenerateSplitslastScanResultTableFiles | Number of splits generated by result table files in the last scan planning. | Gauge | Partition, Bucketnone | Number | Scan planning |
CompactionMetrics
...
Metric Name | Description | Type | Tagged | Unit | Update at |
lastCompactionDuration | The time it took to complete the last compaction. | Gauge | Partition, Bucketnone | Ms | Timer starts before compaction, update after the last compaction finished |
compactionDuration | Distributions of the time taken by the last few compactions. | Histogram | Partition, Bucketnone | Ms | Timer starts before compaction, update after each compaction finished |
lastTableFilesCompactedBefore | Number of deleted files in last compaction | Gauge | Partition, Bucketnone | Number | After getting compaction result. |
lastTableFilesCompactedAfter | Number of added files in last compaction | Gauge | Partition, Bucketnone | Number | After getting compaction result. |
lastChangelogFilesCompacted | Number of changelog files compacted in last compaction | Gauge | Partition, Bucketnone | Number | After getting compaction result. |
lastSortedRunslastCompactOutputLevel | Number of total sorted runs of all levels at last compaction | Gauge | Partition, Bucketnone | Number | Updating levels after getting compaction result. |
lastLevel0FileslastCompactFileSize | Number of files at level 0 at Sum of file size compacted in last compaction | Gauge | Partition, Bucketnone | Number | Updating levels after getting compaction result. |
...